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<br />8 • <br />Spruce-fir forest: Often dense stands of Engelmann spruce and sub- <br />alpine fir; sometimes intermixed or replaced by lodgpole pine <br />CPinus cor.tortaJ or aspen (Populus tremuloidesJ depending on <br />site conditions and perturbations such as fire or logging. <br />Ponderosa pine - Douglas-fir forest: Below the spruce-fir, but often <br />intermingled with it, ponderosa pine (Pinus ponderosa) is on <br />the drier sites, usually south-facing slopes and Douglas-fir <br />(Pseudotsuga menziesiiJ is on the moister sites, usually north- <br />facing. <br />i <br />Riparian: Along the Purgatoire River floodplain, plains cottonwoods <br />(Pnpulus sargentiiJ are common as are coyote willow (SaZiW exi,guaJ, <br />woods rose CROSa :~oodsiiJ and other moisture-loving plants. Higher . <br />along stream courses,cottonwoods drop out and other species of <br />willow become dominant; but a narrow band of riparian habitats <br />straddle the stream courses nearly to their source. A willov, carr <br />vegetation type, recognized by Uniscale (1980) was reported for <br />the Maxwell Mine site. Because of its similarity of flora and <br />fauna, I include it in discussions of the Riparian type. <br />Terrestrial and Stream Habitats <br />at or Near the Kline Sites <br /> <br />The greatest potential for direct impacts of present and future <br />mining activity on fish and wildlife will be on those resident species <br />of low mobility occupying habitats within or near areas of activity. <br />Therefore, I will discuss these habitats, their inhabitants and some . <br />